CodePen

If you’re a CodePen user, this shouldn’t affect you aside from potentially seeing some console noise while we work this out. Carry on! At CodePen we have Embedded Pens which are shown in an <iframe>. These contain user-authored code served from a non-same-origin URL. We like to be both safe an... read more

We get all excited when we get new CSS features. Well, I do anyway. It’s amazing, because sometimes it unlocks something we’ve literally never been able to do before. It’s wonderful when an artist finishes a new painting, and something to be celebrated. But this is more akin to a new color dropping,... read more

We’re over 13 years old as a company now. We decide that we’re not a startup anymore (we’re a “small business” with big dreams) but we are still indie. We’ve seen trends come and go. We just do what we do, knowing the tradeoffs, and plan to keep getting better as long as we can. […]... read more

Damning opening words from Edwin Heathcote in Why designers abandoned their dreams of changing the world. Every single thing on Earth not produced by nature had been designed. That was the spiel. Design wanted it all. Now Earth is a mess, its climate warming rapidly, its seas full of waste. There ar... read more

Or just “Embeds” as we more frequently refer to them as. Stephen and Chris talk about the fairly meaty project which was re-writing our Embeds for a CodePen 2.0 world. No longer can we assume Pens are just one HTML, CSS, and JavaScript “file”, so they needed a bit of a redesign, but doing as […]... read more

Nothing is above a little healthy criticism. Here’s Den Odell’s article We Keep Reinventing CSS, but Styling Was Never the Problem. It’s easy to forget what CSS was originally designed for: documents. You’d write some HTML, style a few headings and paragraphs, maybe float an image to the left, and c... read more

Alex and Chris hop on the show to talk about a bit of technology that Alex calls “The 2nd best technological choice he’s ever made.” That technology is called Tree-sitter. It’s a code parsing tool for building ASTs (Abstract Syntax Trees) out of code. GitHub uses it to power search and “go to” funct... read more

My daughter had a little phase of being into Word Searches. I found it to be a cool dad moment when I was like “I’ll make you a tool to make them!”. That’s what she was into. She liked doing them OK, but she really liked the idea of making them. So my tool starts […]... read more

Chris & Marie jump on the podcast to talk about just how drastically customer support has changed over the last few years. We still exclusively do customer support over email. Incoming email from real customers who need a hand with something where they type out that email in plain languages them... read more

Adam Argyle is clear with some 2025 CSS advice: I think every front-end developer should know how to enable page transitions, transition a <dialog>, popover, and <details>, animate light n’ dark gradient text, type safe their CSS system, and add springy easing to animation. Nobody asked ... read more